Speaker cable thoughts

I am getting ready to upgrade my speaker cable. Would like some input.System as follows:
Ayre CX-7eMP
Aesthetix Calypso
Bel Canto 500m
Von Schweikert VR-2
MAC CuQ speaker cable
MAC Mysic balanced IC's

Budget up to 600
Would be ok with used cables
Don't know if you considered this. How about going up the MAC speaker cable ladder? Get the more expensive Silver AG or MAC Shotguns. I'm sure Steve from MAC would work with you as you are a returning customer. He would also know what would work well with the Mystic Balanced ICs you've got.

Good luck with the search.
I recommend Acoustic Zen Zatoris or Hologram. These come up fairly regularly. These are not 'budget' cables (not that there's anything wrong with that).
What is it that you don't like about your present cables?
Acoustic Zen Satori will sound great with your gear. I run the bi wire model with my VR4SR2 and Bel Canto Ref1000m. I think the Bel Canto gear does better with copper vs. silver cabling.
I have Ayre and am using Anti-Cables with great results. There are some for sale at Audiogon classified.
I think the low mids could be smoother but other than that I just thought I could get more "magic" out of these components. I have done some room treatment but plan to do more in the near future.
I have thought of moving up the chain with MAC but I was also looking for other suggestions.